char* reverseLeftWords(char* s, int k) {
	int i = 0;
	int len = strlen(s);
	for (i = 0; i < k; i++) {
		char tmp = s[0];
		int j = 0;
		for (j = 0; j < len - 1; j++) {
			s[j] = s[j + 1];
		}
		s[len - 1] = tmp;
	}
	return s;
}
